setInterval(function(){
    var  ulhot=document.querySelector('.hot ul')
    var marginLeft=parseInt(ulhot.style.marginLeft)
    marginLeft--

    if(marginLeft<=-2032){
        ulhot.style.marginleft='0px'
    }
    else{
        ulhot.style.marginLeft=marginLeft+'px'
    }
},10 )